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Follow-Up Services: Ongoing Onsite Certification Inspections

Understanding ongoing inspection requirements for your UL Certifications.

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Follow-Up Services program

The process of obtaining a certification doesn’t stop when a product leaves our testing laboratories. Once you have completed your project and achieved UL Certification, our ongoing onsite certification inspection, known as the Follow-Up Services program, begins at the locations you identify as authorized to manufacture your product. 

The Follow-Up Services program is designed to confirm that a manufacturer's UL Certified product continues to comply with the original certification requirements. This work takes place through factory inspections and audits at locations where UL Certified products are manufactured and the UL Mark applied.

Key elements of onsite certification inspections

A key element of our ongoing certification requirement is the factory inspection to confirm the certified product being manufactured is the same (or meets the requirements) as that assessed in the original evaluation.

If a product bears a UL Mark, a manufacturer must be able to provide verification that the product is constructed to meet the Follow-Up Service Procedure requirements. This is to be confirmed during the Initial Production Inspection.

In addition, a key element in determining compliance with UL Solutions requirements is confirming that materials and components used in UL Certified products are consistent with their descriptions in UL Solutions Follow-Up Services procedures, such as use of UL Listed or Recognized components. This is determined by review of component markings and appropriate component traceability.

When construction changes to UL Certified products are necessary you may submit your request to your local UL Solutions field engineer for assistance. Visit our Customer Guide To Submitting Revisions To UL Solutions webpage to learn more.

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Customer requirements documents

There are key documents that are required or can be helpful during inspections. You can find links to them below. 

Canadian Certification Requirements for Bilingual Safety, Warning and Caution Markings

UL will verify requirements for bilingual safety, warning and caution markings that are required for products certified for Canada. This document applies to all customers of UL’s product certification services for the Canadian markets, i.e., C-UL or ULC Mark certifications.
Download PDF

UL Mark Surveillance Program - Liquid, powders, gases and hazardous sample shipments

Customer facing document
Download PDF

Product specific resources

UL Requirements for Knockouts in Sheet Metal Enclosures, Guidelines for counterchecking knockouts

UL Requirements for Knockouts in Sheet Metal Enclosures, Guidelines for counterchecking knockouts
Download PDF

The value of onsite certification inspections

We work with you every step of the way throughout the lifecycle of you product. Our field engineers are able to support your ongoing certification services needs, forging a mutually beneficial relationship.

As your needs change, we change with you, providing customized assistance as you navigate new product launches, process adjustments and growth opportunities. Our ongoing involvement helps protect the investment that you’ve made in achieving UL Certification and benefits you by acting as your trusted safety, security and sustainability partner throughout your compliance journey.

Our comprehensive ongoing certification services and market surveillance help to drive compliance in the supply chain, reduce risks and costs associated with unsafe products and protect your brand reputation and the integrity of the UL Mark that you have earned. 

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When will onsite certification inspections start?

While certification testing in the laboratory provides an initial assessment of compliance, our industry-leading Follow-Up Services program continues to determine compliance long after a product has left our testing facilities.          

These ongoing certification services take place through inspections and audits at locations where UL Certified products are manufactured, assembled, fabricated, processed, finished, or where products are stored or labeled with UL Marks.        

Our ongoing certification services focus on examining both completed end products as well as the components that comprise those finished products. Component safety is a foundational element of the overall safety of a finished product and is critical in getting safer, compliant products to market.

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Get your start with FUStart

FUStart is a resource to help you prepare for factory inspections and audits by our field engineering team. You can review the FUStart overview on your own, or you can review it with the UL Solutions field engineer assigned to your account. This tool is an important training resource to help you seamlessly implement our follow-up requirements and to maintain ongoing compliance and certification after successfully completing your UL Solutions product certification testing.

Reviewing the FUStart tool with your own manufacturing team will help you understand our policies and requirements for manufacturing UL Certified products and plan your production and documentation.

Download a copy of the FUStart tool

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To learn more, please contact us or speak directly to your local field engineer.

Additional resources

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Marks and Labels

UL Solutions is a global leader in testing, inspection, certification, auditing and validation. UL Solutions is a global leader in testing, inspection, certification, auditing and validation. Our UL Mark is recognized as a symbol of trust, appearing on billions of products globally.

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Answers to your frequently asked questions, report revision submissions and contact information for customer support.

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